Follow these steps to troubleshoot the color issue on your Smart TV:

1. Reset your TV – Resetting the system can help restore television color settings to normal.

   To reset your TV, go to 'Settings', locate the 'Reset' option, and click on it.

2. Check and adjust your TV picture settings – Go to the 'Picture Settings' option and make sure that the right picture mode is selected.

   You can also try adjusting the color setting, sharpness, and brightness settings for better results.

3. Make sure the HDMI connection is secure – Confirm that your HDMI cable is inserted tightly into the back of the TV.

   If you are using a long HDMI cable, try using a shorter cable.

4. Update the TV system – If the problem persists, check the TV's system updates.

   To do this, go to 'Settings', look up 'System Updates', and select 'Check for Updates'.